我想知道如何仅根据信用卡的号码来判断信用卡的类型。有谁知道确定可靠的方法吗?
当前回答
Stripe提供了这个很棒的javascript库来检测卡片方案。让我添加一些代码片段,并向您展示如何使用它。
首先包括它到你的网页作为
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/jquery.payment/1.2.3/jquery.payment.js " ></script>
其次,利用功能cardType来检测卡片方案。
$(document).ready(function() {
var type = $.payment.cardType("4242 4242 4242 4242"); //test card number
console.log(type);
});
这里有更多示例和演示的参考链接。
Stripe博客的jquery.payment.js Github库
其他回答
不要试图检测信用卡类型作为处理支付的一部分。您正在冒着拒绝有效事务的风险。
如果您需要向您的支付处理器提供信息(例如,PayPal信用卡对象需要命名卡类型),那么从可用的最少信息中猜测它,例如。
$credit_card['pan'] = preg_replace('/[^0-9]/', '', $credit_card['pan']);
$inn = (int) mb_substr($credit_card['pan'], 0, 2);
// @see http://en.wikipedia.org/wiki/List_of_Bank_Identification_Numbers#Overview
if ($inn >= 40 && $inn <= 49) {
$type = 'visa';
} else if ($inn >= 51 && $inn <= 55) {
$type = 'mastercard';
} else if ($inn >= 60 && $inn <= 65) {
$type = 'discover';
} else if ($inn >= 34 && $inn <= 37) {
$type = 'amex';
} else {
throw new \UnexpectedValueException('Unsupported card type.');
}
这个实现(只使用前两位数字)足以识别所有主要的(在PayPal的情况下是所有受支持的)卡片方案。实际上,您可能希望完全跳过异常,并默认使用最流行的卡片类型。让支付网关/处理器告诉您在响应您的请求时是否存在验证错误。
现实情况是,你的支付网关并不关心你提供的价值。
卡号的前六位数字(包括初始信息信息) 数字)被称为发行者识别号码(IIN)。这些 识别向该卡发行该卡的发卡机构 持有人。其余的数字由发卡机构分配。的 卡号的长度是它的位数。许多发卡机构打印 他们卡上的整个IIN和账号。
基于以上事实,我想保留一段JAVA代码来识别卡片品牌。
样卡类型
public static final String AMERICAN_EXPRESS = "American Express";
public static final String DISCOVER = "Discover";
public static final String JCB = "JCB";
public static final String DINERS_CLUB = "Diners Club";
public static final String VISA = "Visa";
public static final String MASTERCARD = "MasterCard";
public static final String UNKNOWN = "Unknown";
卡前缀
// Based on http://en.wikipedia.org/wiki/Bank_card_number#Issuer_identification_number_.28IIN.29
public static final String[] PREFIXES_AMERICAN_EXPRESS = {"34", "37"};
public static final String[] PREFIXES_DISCOVER = {"60", "62", "64", "65"};
public static final String[] PREFIXES_JCB = {"35"};
public static final String[] PREFIXES_DINERS_CLUB = {"300", "301", "302", "303", "304", "305", "309", "36", "38", "39"};
public static final String[] PREFIXES_VISA = {"4"};
public static final String[] PREFIXES_MASTERCARD = {
"2221", "2222", "2223", "2224", "2225", "2226", "2227", "2228", "2229",
"223", "224", "225", "226", "227", "228", "229",
"23", "24", "25", "26",
"270", "271", "2720",
"50", "51", "52", "53", "54", "55"
};
检查输入的数字是否有任何给定的前缀。
public String getBrand(String number) {
String evaluatedType;
if (StripeTextUtils.hasAnyPrefix(number, PREFIXES_AMERICAN_EXPRESS)) {
evaluatedType = AMERICAN_EXPRESS;
} else if (StripeTextUtils.hasAnyPrefix(number, PREFIXES_DISCOVER)) {
evaluatedType = DISCOVER;
} else if (StripeTextUtils.hasAnyPrefix(number, PREFIXES_JCB)) {
evaluatedType = JCB;
} else if (StripeTextUtils.hasAnyPrefix(number, PREFIXES_DINERS_CLUB)) {
evaluatedType = DINERS_CLUB;
} else if (StripeTextUtils.hasAnyPrefix(number, PREFIXES_VISA)) {
evaluatedType = VISA;
} else if (StripeTextUtils.hasAnyPrefix(number, PREFIXES_MASTERCARD)) {
evaluatedType = MASTERCARD;
} else {
evaluatedType = UNKNOWN;
}
return evaluatedType;
}
最后,效用方法
/**
* Check to see if the input number has any of the given prefixes.
*
* @param number the number to test
* @param prefixes the prefixes to test against
* @return {@code true} if number begins with any of the input prefixes
*/
public static boolean hasAnyPrefix(String number, String... prefixes) {
if (number == null) {
return false;
}
for (String prefix : prefixes) {
if (number.startsWith(prefix)) {
return true;
}
}
return false;
}
参考
条纹卡生成器
匹配对应卡供应商的正则表达式规则:
(4\d{12}(?:\d{3})?) (5[1-5]\d{14}) (3[47]\d{13})为美国运通。 ((?: 5020 | 5038 | 6304 | 6579 | 6761) \ d {12} (?: \ \ d) ?)大师。 (3(?:0[0-5]|[68][0-9])[0-9]{11}) (6(?:011|5[0-9]{2})[0-9]{12})用于发现。 (35[2-8][89]\d\d\d{10})
另一个api解决方案在rapidapi银行卡位数检查有250K+发行卡类型。
只有一个GET rest api请求,并获得发卡机构信息,如:
{ "bin_number": 535177, "bank": "Finansbank A.S.", "scheme": "MASTERCARD", "type": "Debit", "country": "Turkey" }
下面是一些用Python编写的布尔函数的示例,如果根据函数名检测到卡片,则返回True。
def is_american_express(cc_number):
"""Checks if the card is an american express. If us billing address country code, & is_amex, use vpos
https://en.wikipedia.org/wiki/Bank_card_number#cite_note-GenCardFeatures-3
:param cc_number: unicode card number
"""
return bool(re.match(r'^3[47][0-9]{13}$', cc_number))
def is_visa(cc_number):
"""Checks if the card is a visa, begins with 4 and 12 or 15 additional digits.
:param cc_number: unicode card number
"""
# Standard Visa is 13 or 16, debit can be 19
if bool(re.match(r'^4', cc_number)) and len(cc_number) in [13, 16, 19]:
return True
return False
def is_mastercard(cc_number):
"""Checks if the card is a mastercard. Begins with 51-55 or 2221-2720 and 16 in length.
:param cc_number: unicode card number
"""
if len(cc_number) == 16 and cc_number.isdigit(): # Check digit, before cast to int
return bool(re.match(r'^5[1-5]', cc_number)) or int(cc_number[:4]) in range(2221, 2721)
return False
def is_discover(cc_number):
"""Checks if the card is discover, re would be too hard to maintain. Not a supported card.
:param cc_number: unicode card number
"""
if len(cc_number) == 16:
try:
# return bool(cc_number[:4] == '6011' or cc_number[:2] == '65' or cc_number[:6] in range(622126, 622926))
return bool(cc_number[:4] == '6011' or cc_number[:2] == '65' or 622126 <= int(cc_number[:6]) <= 622925)
except ValueError:
return False
return False
def is_jcb(cc_number):
"""Checks if the card is a jcb. Not a supported card.
:param cc_number: unicode card number
"""
# return bool(re.match(r'^(?:2131|1800|35\d{3})\d{11}$', cc_number)) # wikipedia
return bool(re.match(r'^35(2[89]|[3-8][0-9])[0-9]{12}$', cc_number)) # PawelDecowski
def is_diners_club(cc_number):
"""Checks if the card is a diners club. Not a supported card.
:param cc_number: unicode card number
"""
return bool(re.match(r'^3(?:0[0-6]|[68][0-9])[0-9]{11}$', cc_number)) # 0-5 = carte blance, 6 = international
def is_laser(cc_number):
"""Checks if the card is laser. Not a supported card.
:param cc_number: unicode card number
"""
return bool(re.match(r'^(6304|670[69]|6771)', cc_number))
def is_maestro(cc_number):
"""Checks if the card is maestro. Not a supported card.
:param cc_number: unicode card number
"""
possible_lengths = [12, 13, 14, 15, 16, 17, 18, 19]
return bool(re.match(r'^(50|5[6-9]|6[0-9])', cc_number)) and len(cc_number) in possible_lengths
# Child cards
def is_visa_electron(cc_number):
"""Child of visa. Checks if the card is a visa electron. Not a supported card.
:param cc_number: unicode card number
"""
return bool(re.match(r'^(4026|417500|4508|4844|491(3|7))', cc_number)) and len(cc_number) == 16
def is_total_rewards_visa(cc_number):
"""Child of visa. Checks if the card is a Total Rewards Visa. Not a supported card.
:param cc_number: unicode card number
"""
return bool(re.match(r'^41277777[0-9]{8}$', cc_number))
def is_diners_club_carte_blanche(cc_number):
"""Child card of diners. Checks if the card is a diners club carte blance. Not a supported card.
:param cc_number: unicode card number
"""
return bool(re.match(r'^30[0-5][0-9]{11}$', cc_number)) # github PawelDecowski, jquery-creditcardvalidator
def is_diners_club_carte_international(cc_number):
"""Child card of diners. Checks if the card is a diners club international. Not a supported card.
:param cc_number: unicode card number
"""
return bool(re.match(r'^36[0-9]{12}$', cc_number)) # jquery-creditcardvalidator